Quran 5:81 — The Feast (Al-Ma'edah)

Had they believed in GOD, and the prophet, and in what was revealed to him herein, they would not have befriended them. But many of them are evil.

[5:80] You would see many of them allying themselves with those who disbelieve. Miserable indeed is what their hands have sent forth on behalf of their souls. GOD is angry with them and, consequently, they will abide forever in retribution.

[5:82] You will find that the worst enemies of the believers are the Jews and the idol worshipers. And you will find that the closest people in friendship to the believers are those who say, "We are Christian." This is because they have priests and monks among them, and they are not arrogant.